Bioacoustics and Medical Acoustics
Picture Description

(Left) Paul Benkeser, a bioacoustics graduate at the University of
Illinois, is preparing to determine the ultrasonic field of a phased
array transducer. Such transducers are used to obtain acoustical
"images" for use in medical diagnosis.

(Right) Jian Zhang, a bioacoustics graduate at the University of
Illinois, is assembling an ultrasonic velocimeter in preparation for
determining the acoustic nonlinearity of biological media.